<?php

use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\IOFactory;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

class Excel
{
    /**
     * excel导出
     * @param array $cols
     * @param array $data
     * @param string $fileName 文件名
     * @param string $fileType 文件类型
     * @return void
     * @throws \PhpOffice\PhpSpreadsheet\Writer\Exception
     */
    public static function exportExcel(array $cols, array $data, string $fileName, string $fileType)
    {
        //文件名称校验
        if (!$fileName) {
            trigger_error('文件名不能为空', E_USER_ERROR);
        }

        //Excel文件类型校验
        $type = ['Excel2007', 'Xlsx', 'Excel5', 'xls'];
        if (!in_array($fileType, $type)) {
            trigger_error('未知文件类型', E_USER_ERROR);
        }
        ob_end_clean();//解决乱码核心 就在此处添加此函数
        if ($fileType == 'Excel2007' || $fileType == 'Xlsx') {
            header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
            header('Content-Disposition: attachment;filename="' . $fileName . '.xlsx"');
            header('Cache-Control: max-age=0');
        } else { //Excel5
            header('Content-Type: application/vnd.ms-excel');
            header('Content-Disposition: attachment;filename="' . $fileName . '.xls"');
            header('Cache-Control: max-age=0');
        }

//
//        $cols = ['id', 'name', 'age'];

//        $data = [
//            [1, 'jack', 10],
//            [2, 'mike', 12],
//            [3, 'jane', 21],
//            [4, 'paul', 26],
//            [5, 'kitty', 25],
//            [6, 'yami', 60],
//        ];


        $spreadsheet = new Spreadsheet();
        $worksheet = $spreadsheet->getActiveSheet();

        //设置工作表标题名称
        $worksheet->setTitle('工作表格1');

        //表头
        //设置单元格内容
        foreach ($cols as $key => $value) {
            $worksheet->setCellValueByColumnAndRow($key + 1, 1, $value);
        }

        $row = 2; //从第二行开始
        foreach ($data as $item) {
            $column = 1;

            foreach ($item as $value) {
                $worksheet->setCellValueByColumnAndRow($column, $row, $value);
                $column++;
            }
            $row++;
        }


//        $fileName = '学生信息';
//        $fileType = 'Xlsx';

        //1.下载到服务器
        //$writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
        //$writer->save($fileName.'.'.$fileType);

        //2.输出到浏览器
        $writer = IOFactory::createWriter($spreadsheet, $fileType); //按照指定格式生成Excel文件
//        excelBrowserExport($fileName, 'Xlsx');
        $writer->save('php://output');
    }

}
